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Adaptability and ‘ Candidatus L iberibacter asiaticus’ titres of Diaphorina citri adults on three weed species in C hina
Author(s) -
Lu Huilin,
Fang Xiaoduan,
Wu Fengnian,
Ouyang Gecheng
Publication year - 2021
Publication title -
pest management science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.296
H-Index - 125
eISSN - 1526-4998
pISSN - 1526-498X
DOI - 10.1002/ps.6360
Subject(s) - diaphorina citri , weed , solanum nigrum , biology , ageratum conyzoides , horticulture , botany , hemiptera
BACKGROUND Diaphorina citri is a vector of ‘ Candidatus Liberibacter asiaticus’ (CLas), which is associated with citrus huanglongbing (HLB). In this study, the adaptability and CLas titres of D. citri adults on three weed species, namely, Ageratum conyzoides , Solanum nigrum and Praxelis clematidea , which are widely distributed in citrus orchards in China, were determined. RESULTS D. citri selected S. nigrum preferentially over the other weed species. The longest survival times of D. citri adults on A. conyzoides , S. nigrum and P. clematidea were 48, 41 and 11 days, respectively. On S. nigrum , the survivorship of females was significantly higher than that of males. The CLas titres of D. citri adults feeding on the three weeds for 1 week increased significantly during autumn but did not change significantly during spring. Conversely, the titres of adults on citrus increased significantly during spring but did not change significantly during autumn. CONCLUSION D. citri exhibited different adaptabilities to the three weed species, but the CLas titres of D. citri adults did not decrease on any of the weeds. These results suggested that the three weed species could help dispersing of D. citri and transmission of CLas while ideal host conditions were scarce or absent. © 2021 Society of Chemical Industry.